The FX4500NF from Sinclair Technologies is a Cross Band Couplers with Frequency 138 to 2500 MHz, Frequency Band1 138 to 960 MHz, Frequency Band2 1710 to 2500 MHz, Insertion Loss Band1 0.4 dB, Insertion Loss Band2 0.4 dB. Tags: Module with Connector. More details for FX4500NF can be seen below.